A Miniaturized MIMO Antenna with Dual-band for 5G Smartphones

Abstract

In this paper, a miniaturized multiple-input and multiple-output (MIMO) antenna with dual bands is designed. The MIMO antenna is composed of 8 elements, each of which is evolved from an inverted-F antenna with a ceramic substrate. The ceramic is used to reduce the size of the antenna element, achieving a 68% size reduction. The measured results show that the impedance bandwidth (reflection coefficient < -6 dB) of the MIMO antenna is 3.4-3.93 GHz & 4.5-5.3 GHz, the isolation is over 10 dB, the envelope correlation coefficients (ECCs) are lower than 0.15.